/* Perplexity Design System */
:root {
    /* Primitive Color Tokens */
    --color-white: rgba(255, 255, 255, 1);
    --color-black: rgba(0, 0, 0, 1);
    --color-cream-50: rgba(252, 252, 249, 1);
    --color-cream-100: rgba(255, 255, 253, 1);
    --color-gray-200: rgba(245, 245, 245, 1);
    --color-gray-300: rgba(167, 169, 169, 1);
    --color-gray-400: rgba(119, 124, 124, 1);
    --color-slate-500: rgba(98, 108, 113, 1);
    --color-brown-600: rgba(94, 82, 64, 1);
    --color-charcoal-700: rgba(31, 33, 33, 1);
    --color-charcoal-800: rgba(38, 40, 40, 1);
    --color-slate-900: rgba(19, 52, 59, 1);
    --color-teal-300: rgba(50, 184, 198, 1);
    --color-teal-400: rgba(45, 166, 178, 1);
    --color-teal-500: rgba(33, 128, 141, 1);
    --color-teal-600: rgba(29, 116, 128, 1);
    --color-teal-700: rgba(26, 104, 115, 1);
    --color-teal-800: rgba(41, 150, 161, 1);
    --color-red-400: rgba(255, 84, 89, 1);
    --color-red-500: rgba(192, 21, 47, 1);
    --color-orange-400: rgba(230, 129, 97, 1);
    --color-orange-500: rgba(168, 75, 47, 1);

    /* TestAstra Custom Colors */
    --color-primary-blue: #1E3A8A;
    --color-accent-blue: #3B82F6;
    --color-primary-purple: #7C3AED;
    --color-accent-purple: #A855F7;
    --color-gunmetal: #374151;
    --color-neon-cyan: #00D9FF;
    --color-neon-pink: #FF6B9D;

    /* RGB versions for opacity control */
    --color-brown-600-rgb: 94, 82, 64;
    --color-teal-500-rgb: 33, 128, 141;
    --color-slate-900-rgb: 19, 52, 59;
    --color-slate-500-rgb: 98, 108, 113;
    --color-red-500-rgb: 192, 21, 47;
    --color-red-400-rgb: 255, 84, 89;
    --color-orange-500-rgb: 168, 75, 47;
    --color-orange-400-rgb: 230, 129, 97;

    /* Background color tokens (Light Mode) */
    --color-bg-1: rgba(59, 130, 246, 0.08);
    --color-bg-2: rgba(245, 158, 11, 0.08);
    --color-bg-3: rgba(34, 197, 94, 0.08);
    --color-bg-4: rgba(239, 68, 68, 0.08);
    --color-bg-5: rgba(147, 51, 234, 0.08);
    --color-bg-6: rgba(249, 115, 22, 0.08);
    --color-bg-7: rgba(236, 72, 153, 0.08);
    --color-bg-8: rgba(6, 182, 212, 0.08);

    /* Semantic Color Tokens (Dark Mode for TestAstra) */
    --color-background: #0a0a0f;
    --color-surface: #1a1a2e;
    --color-text: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-primary: var(--color-neon-cyan);
    --color-primary-hover: var(--color-accent-blue);
    --color-primary-active: var(--color-primary-blue);
    --color-secondary: rgba(255, 255, 255, 0.1);
    --color-secondary-hover: rgba(255, 255, 255, 0.2);
    --color-secondary-active: rgba(255, 255, 255, 0.3);
    --color-border: rgba(255, 255, 255, 0.2);
    --color-btn-primary-text: #000000;
    --color-card-border: rgba(255, 255, 255, 0.1);
    --color-card-border-inner: rgba(255, 255, 255, 0.1);
    --color-error: var(--color-red-400);
    --color-success: var(--color-neon-cyan);
    --color-warning: var(--color-orange-400);
    --color-info: var(--color-gray-300);
    --color-focus-ring: rgba(0, 217, 255, 0.4);

    /* Typography */
    --font-family-base: "Orbitron", "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    --font-size-xs: 11px;
    --font-size-sm: 12px;
    --font-size-base: 14px;
    --font-size-md: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-2xl: 20px;
    --font-size-3xl: 24px;
    --font-size-4xl: 30px;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 550;
    --font-weight-bold: 600;
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --letter-spacing-tight: -0.01em;

    /* Spacing */
    --space-0: 0;
    --space-1: 1px;
    --space-2: 2px;
    --space-4: 4px;
    --space-6: 6px;
    --space-8: 8px;
    --space-10: 10px;
    --space-12: 12px;
    --space-16: 16px;
    --space-20: 20px;
    --space-24: 24px;
    --space-32: 32px;
    --space-48: 48px;
    --space-64: 64px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-base: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15), inset 0 -1px 0 rgba(0, 0, 0, 0.03);

    /* Animation */
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Import futuristic font */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;900&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-base);
    background: var(--color-background);
    color: var(--color-text);
    overflow-x: hidden;
    line-height: var(--line-height-normal);
}

/* Back button */
.back-button {
    position: fixed;
    top: var(--space-32);
    left: var(--space-32);
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: var(--space-12) var(--space-24);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    z-index: 100;
}

.back-button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-5px);
}

/* Page transitions */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, 
        var(--color-background), 
        var(--color-primary-blue), 
        var(--color-primary-purple)
    );
    transform: translateX(100%);
    z-index: 1000;
    pointer-events: none;
}

/* Canvas container */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(45deg, 
        var(--color-background), 
        var(--color-primary-blue), 
        var(--color-primary-purple)
    );
    background-size: 400% 400%;
    animation: gradientShift 8s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Glitch text effect */
.glitch {
    position: relative;
    color: var(--color-text);
    font-size: clamp(2rem, 8vw, 5rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-shadow: 0 0 20px var(--color-neon-cyan);
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    animation: glitch-1 0.5s infinite linear alternate-reverse;
    color: var(--color-neon-cyan);
    z-index: -1;
}

.glitch::after {
    animation: glitch-2 0.5s infinite linear alternate-reverse;
    color: var(--color-neon-pink);
    z-index: -2;
}

@keyframes glitch-1 {
    0% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
    100% { transform: translate(0); }
}

@keyframes glitch-2 {
    0% { transform: translate(0); }
    20% { transform: translate(2px, 2px); }
    40% { transform: translate(2px, -2px); }
    60% { transform: translate(-2px, 2px); }
    80% { transform: translate(-2px, -2px); }
    100% { transform: translate(0); }
}



/* Footer */
.footer {
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-32);
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-32);
    margin-bottom: var(--space-20);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    font-weight: 500;
}

.footer-link:hover {
    color: var(--color-neon-cyan);
    text-shadow: 0 0 10px var(--color-neon-cyan);
}

.footer-copyright {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .back-button,
    .theme-toggle {
        top: var(--space-16);
        padding: var(--space-8) var(--space-16);
    }

    .back-button {
        left: var(--space-16);
    }

    .theme-toggle {
        right: var(--space-16);
    }
}